How do I plot this?

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Ladeanne Graycochea 2018-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/384051-how-do-i-plot-this

评论： James Tursa 2018-2-23

y=2*sin(x),if x<20
y=cos(3x),if 20≤x<40
y=sin(0.3x),if 40≤x<60 
y=8*sin(x),if 60≤x
y=6,if 6<y

Requirements: (1) The plot should have x label, y label, and title. All of these should be Times New Roman, 12 pt. (2) x range from 1 to 100 with 0.1 increment. Plot x-y.

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Star Strider 2018-2-21

This doesn’t make sense:

y=6,if 6<y

Ladeanne Graycochea 2018-2-22

We could ignore that last part.

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回答（1 个）

Roger Stafford 2018-2-23

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I assume you had in mind that x is given in degrees. You will get some discontinuities with these:

   x1 = 1:.1:20; y1 = 2*sind(x1);
   x2 = 20:.1:40; y2 = cosd(3*x2);
   x3 = 40:.1:60; y3 = sind(.3*x3);
   x4 = 60:.1:100; y4 = min(8*sind(x4),6);
   plot([x1,x2,x3,x4],[y1,y2,y3,y4],'y-')

I will let you work out the label and title details.